I believe in writing quality software that is reliable, extensible, and for which the source code is clearly commented to make it possible for other people to join the project and figure out what's going on. For this reason I spend a lot of my spare time working on projects such as KDE. Commercial projects unfortunately seem to rarely involve the production of high quality code. For example in commercial projects most programmers don't know this information, and most "consultants" and people who hire them don't know this.